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Polymers 2017, 9(12), 703; https://doi.org/10.3390/polym9120703

Proton Conductive Channel Optimization in Methanol Resistive Hybrid Hyperbranched Polyamide Proton Exchange Membrane

1
School of Chemistry and Materials Science, Guizhou Normal University, 116 Baoshan North Road, Guiyang 550001, China
2
Sustainable Energy Laboratory, Faculty of Materials Science and Chemistry, China University of Geosciences Wuhan, 388 Lumo RD, Wuhan 430074, China
3
College of Chemistry, Chemical Engineering and Material Science, Zaozhuang University, Zaozhuang 277160, China
*
Authors to whom correspondence should be addressed.
Received: 10 November 2017 / Revised: 5 December 2017 / Accepted: 8 December 2017 / Published: 14 December 2017
(This article belongs to the Special Issue Polymeric Membranes)
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Abstract

Based on a previously developed polyamide proton conductive macromolecule, the nano-scale structure of the self-assembled proton conductive channels (PCCs) is adjusted via enlarging the nano-scale pore size within the macromolecules. Hyperbranched polyamide macromolecules with different size are synthesized from different monomers to tune the nano-scale pore size within the macromolecules, and a series of hybrid membranes are prepared from these two micromoles to optimize the PCC structure in the proton exchange membrane. The optimized membrane exhibits methanol permeability low to 2.2 × 10−7 cm2/s, while the proton conductivity of the hybrid membrane can reach 0.25 S/cm at 80 °C, which was much higher than the value of the Nafion 117 membrane (0.192 S/cm). By considering the mechanical, dimensional, and the thermal properties, the hybrid hyperbranched polyamide proton exchange membrane (PEM) exhibits promising application potential in direct methanol fuel cells (DMFC). View Full-Text
Keywords: proton exchange membrane; methanol resistivity; direct methanol fuel cells; hybrid membrane proton exchange membrane; methanol resistivity; direct methanol fuel cells; hybrid membrane
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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Ma, L.; Li, J.; Xiong, J.; Xu, G.; Liu, Z.; Cai, W. Proton Conductive Channel Optimization in Methanol Resistive Hybrid Hyperbranched Polyamide Proton Exchange Membrane. Polymers 2017, 9, 703.

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